| 1 | HPT | Heli-pet | Callsign: Heli-Pet, Ceased operations. | UA | AVCODES |
| 2 | HPTC | HAPPY TRUCKING CO INC | | | SCAC4 |
| 3 | HPTD | High Point, Thomasville & Denton R.R. Co. | 1/1975-7/2005 | | NAKINA |
| 4 | HPTD | High Point, Thomasville & Denton R.R. Co. | 1/75-7/2000 | | NRHS |
| 5 | HPTD | HIGH POINT, THOMASVILLE & DENTON RAILROAD CO. | | | PWRC |
| 6 | HPTD | High Point, Thomasville and Denton Railroad | | | RSRV |
| 7 | HPTD | High Point, Thomasville & Denton R.R. Co. | | USA | TRAFFIC |
| 8 | HPTF | HIGH PERFORMANCE TRANSPORT AND SHIP | | | SCAC4 |
| 9 | HPTG | HOFFMAN, PAUL TRUCKING INC | | | SCAC4 |
| 10 | HPTI | HOPE TRUCKING INC | | | SCAC4 |
| 11 | HPTJ | HIGH PLAINS TRUCKING LLC | | | SCAC4 |
| 12 | HPTL | HIGH POOL TANKERS LIMITED | | | SCAC4 |
| 13 | HPTN | HOOPERS TRUCKING LLC | | | SCAC4 |
| 14 | HPTO | HULSEY PROPANE TRANSPORT INC | | | SCAC4 |
| 15 | HPTP | HP TRANSPORT INC | | | SCAC4 |
| 16 | HPTU | HIGHWAY PIPELINE | | | PWRC |
| 17 | HPTU | Highway Pipeline | | | RSRV |
| 18 | HPTX | Hellbron-Palmer Tank Line Co. | 7/1923 | | NAKINA |
| 19 | HPTX | HELLBRON-PALMER TANK LINE CO. | | | PWRC |
